/Engine/Source/Runtime/Engine/Classes/Components/SplineMeshComponent.h
Used to store spline mesh data during RerunConstructionScripts
struct FSplineMeshInstanceData : public [FStaticMeshComponentInstanceData](API\Runtime\Engine\Components\FStaticMeshComponentInstanceData)
FVector
EndPos
FVector
EndTangent
FVector
StartPos
FVector
StartTangent